Clamp for holding rectangular pieces



5.027%; Bea/1 0:55. J 50 7. Fa/en fed F9212 aw necessary tools a, a, for cutting a "female UNITED STATES Arr to HENRY MILLER, OF GRAFTON, VIRGINIA.

SLAM]? FOR HOLDING RECTANGULAR PIECES. OF WOOD WHILE BEING BORED, TAPPED, 8w.

Specification of Letters Patent No.

To all whom it may concern:

Be it known that I, HENRY MILLER, of Grafton, in the county of Taylor and State of Virginia, have invented certain new and useful Improvements in Machines for Cutting the Screws in Bed-Posts; and I do hereby declare the following to be a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, making a part of the specification, in which Figure 1 represents an elevation of the machine, Fig. 2, represents a central vertical section through the same, and Fig. 3, represents a horizontal section taken through the red line m, m, of Fig. 1.

Similar letters of reference where they occur in the several figures, denote like parts of the machine in all of them.

The nature of my invention consists in combining with a rectangular box or frame which holds the cutting tool, or tools, an adjustable support, for regulating the height of the same, and for sustaining the post in its vertical position, and a screw clamp which takes against one of the corners of the post, and forces it against the diagonal corner of the frame, to fix the horizontal position of the said post, and to firmly hold the bed post against the action of the cutting tools.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

A, represents a rectangular frame or box, which maybe of wood; and B,an iron frame of similar shape, which incases the wooden frame A, at its top, to prevent any spring ing, or yielding of said frame. The iron frame B, has upon it the screw nuts C, G, into which fit, and work, the male screws D, D, which have on their inner ends the screw in the bed post hole. These Inale screws D, D, are turned or operated by a winch E, and their screw thread regulates the screw. thread, that is to be cut in the bed post hole.

The lower part of the frame or box A, may be open, for convenience, and there is arranged on the interior of the frame, ledges or strips 0, c, on which rests, and by which, may be adjusted, a supporting 19,307, dated February 9, 1858.

piece F, on which the bed post G, stands, said support F defining the height at which the tools are to work on the post.

At that corner of the frame A, B, which is diagonally opposite to, the corner or angle thereof embraced between the boring tools, a screw winch H, passes through, having on its inner end a clamp or pressing piece I, so made as to fit against the corner of the post G, as shown in Fig. 3. By means of the screw winch H, the clamp I, is ammed up against the post G, and forces up the opposite corner of the post into the angle 6, of the frame A, where it is rigidly held until the screws are cut in the post holes, for receiving the male screws cut on the rails.

i, 2' are removable pieces fitted into the box to receive the bed post, and these pieces can be changed for others, so as to adapt the machine for posts of various sizes or external shapes. The post holes may be bored out by other tools applied to the same screw nuts 0 c, and then they are removed and the tools for cutting the screw threads in said holes, are introduced. And by this arrangement the holes and screws in the posts are all exactly alike, so that any rail will fit them. It will be perceived that, the threads on the tools D, D, are reversed, so that one will cut a right, and the other a left hand screw thread, as is usual in this kind of bedsteads.

The machine is very simple, and efficient, and there can be no possible error, in the position of the bed post in it, when clamped, and consequently great exactness, in the boring and screw cutting.

F, is a projecting handle by which the slide or supporting piece F, is drawn out or replaced. And a, is a spring, for carrying back the presser block or clamp I, when the screw winch H, is run back, to facilitate the removal of the finished post, and replacing of another. By this arrangement, the post is not moved in the least, during both the operations of boring, and of cutting the screws in the bored hole, and thus a perfect hole and screw is cut. Clamping and gaging by the diagonal corners of the post too, is much more accurate than by the sides, in the same proportion that an edge presents less liability to error than a broad surface.

I have said that the post holes may be bored first, in the same machine, by a change of tools. But do not claim so doing, because they may, and are generally bored in another machine.

5 Having thus fully describd the nature and object of my invention, what I claim therein as new and desire to secure by Letters Patent is The Within described apparatus for adjusting, holding, and clamping bed posts, 10 While their previously bored holes are having the screw threads cut therein, as herein explained and as set forth.

HENRY MILLER.

Witnesses WM. K. HALL, N. H. MEANS. 

